${{\boldsymbol \psi}_{{2}}{(3823)}}$ MASS

INSPIRE search
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 3823.7 \pm0.5}$ OUR AVERAGE  Error includes scale factor of 1.1.
$3824.08$ $\pm0.53$ $\pm0.14$ 137 1
AAIJ
2020S
LHCB ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{+}}$
$3821.7$ $\pm1.3$ $\pm0.7$ $19$ $\pm5$ 2
ABLIKIM
2015S
BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \chi}_{{c1}}}{{\mathit \gamma}}$
$3823.1$ $\pm1.8$ $\pm0.7$ $33$ $\pm10$ 3
BHARDWAJ
2013
BELL ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \chi}_{{c1}}}{{\mathit \gamma}}{{\mathit K}^{\pm}}$
1  Using the measured ${\mathit m}_{{{\mathit \psi}_{{2}}{(3823)}}}–{\mathit m}_{{{\mathit \psi}{(2S)}}}$ = $137.98$ $\pm0.53$ $\pm0.14$ MeV.
2  From a simultaneous unbinned maximum likelihood fit of ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \chi}_{{c1}}}{{\mathit \gamma}}$ data (the ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ recoil mass) taken at $\sqrt {s }$ values of 4.23, 4.26, 4.36, 4.42, and 4.60 GeV to simulated events including both ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \chi}_{{c1}}}{{\mathit \gamma}}$ and ${{\mathit \psi}_{{2}}{(3823)}}$ $\rightarrow$ ${{\mathit \chi}_{{c1}}}{{\mathit \gamma}}$ together, with floating mass scale offset for ${{\mathit \psi}{(2S)}}$, floating ${{\mathit \psi}_{{2}}{(3823)}}$ mass, and zero ${{\mathit \psi}_{{2}}{(3823)}}$ width, resulting in a significance of 5.9$\sigma $ when including systematic uncertainties.
3  From a simultaneous fit to ${{\mathit B}^{\pm}}$ $\rightarrow$ ( ${{\mathit \chi}_{{c1}}}{{\mathit \gamma}}$) ${{\mathit K}^{\pm}}$ and ${{\mathit B}^{0}}$ $\rightarrow$ ( ${{\mathit \chi}_{{c1}}}{{\mathit \gamma}}$) ${{\mathit K}_S^0}$ with significance 4.0$\sigma $ including systematics. Corrected for the measured ${{\mathit \psi}{(2S)}}$ mass using ${{\mathit B}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit K}}$ $\rightarrow$ ( ${{\mathit \gamma}}{{\mathit \chi}_{{c1}}}$) ${{\mathit K}}$ decays.
References:
AAIJ 2020S
JHEP 2008 123 Study of the $\psi_2(3823)$ and $\chi_{c1}(3872)$ states in $B^+ \rightarrow \left( J\psi\pi^+\pi^-\right)K^+$ decays
ABLIKIM 2015S
PRL 115 011803 Observation of the ${{\mathit \psi}}(1{}^{3}D_{2}$) State in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}{{\mathit \chi}_{{c1}}}$ at BESIII
BHARDWAJ 2013
PRL 111 032001 Evidence of a New Narrow Resonance Decaying to ${{\mathit \chi}_{{c1}}}{{\mathit \gamma}}$ in ${{\mathit B}}$ $\rightarrow$ ${{\mathit \chi}_{{c1}}}{{\mathit \gamma}}{{\mathit K}}$